Edit Post Page: Admin Sidebar Error & “Can’t Load Stylesheet”

I use ColorMag with a ColorMag Child Theme on my website, and while I was writing a post today, ColorMag received an update. I updated without any problems and everything looked fine except on the Add/Edit Post page where the admin sidebar was now right in the center of a page, as was everything else. It doesn’t show up like that on my Add Event pages, but it does occur on my Add/Edit Page page. My Mozilla Inspector says that it “can’t load the stylesheet,” but I don’t know what could have changed from the ColorMag update that would affect the appearance of only these editing pages. I can still use them and add posts/pages, but it’s obviously wrong and I want to fix it. I have deactivated nearly every plugin that affects those pages and still can’t figure it out. Any help is appreciated. I have a screenshot but can’t see where to upload it.

The page I need help with: [log in to see the link]